Patent US3570661A successfully refreshed from Google Patents.
US3570661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment knob assembly for a disc pack bottom cover
Assignee: Memorex Corp
•
Filing: 1969-01-17
•
Granted: 1971-03-16
•
Expires: 1989-01-17
Abstract
Abstract An improved cover set for magnetic memory disc packs in which the attachment mechanism for the bottom cover includes a manipulating handle below the bottom cover having a stem smaller than the handle extending through an aperture in the cover with the stem having on its upper end a threaded portion for threaded attachment to the disc memory, a sleeve mounted above the bottom cover telescopically encircling the stem for preventing withdrawal of the stem through the cover, and a releasable attachment connecting the sleeve and the stem where they telescopically fit together.
Inventors
- 👤 Cyril Kersh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:35
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B23/032; G11B23/0323; G11B23/0325
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
206 words
In a disc pack having a memory structure including a central hub with an upwardly facing latch portion and a downwardly facing threaded portion surrounded by a downwardly facing conical seat, a plurality of memory discs rigidly secured to said hub, a top cover releasably attached to said latch portion and extending outwardly therefrom and hence downwardly around said memory structure, and a bottom cover releasably attached to said threaded portion and extending therefrom into engagement with said top cover, the improved bottom cover which comprises: A generally circular panel adapted to cover the bottom of said memory structure with said panel having a central aperture therein; A knob member having a manipulating portion which is larger than said aperture and located below said panel and a stem portion integrally formed with said manipulating portion and extending upwardly herefrom through said aperture with said stem portion having a threaded surface near its upper end for releasable threaded engagement witH said threaded portion of said memory structure; A sleeve which is larger than said aperture located above said panel with said sleeve having an interior bore telescopically encircling said stem and an exterior upwardly facing surface; and Releasable attaching means releasably securing said stem to said sleeve.
Claim 2
Dependent Claim
206 words
In a disc pack having a memory structure including a central hub with an upwardly facing latch portion and a downwardly facing threaded portion surrounded by a downwardly facing conical seat, a plurality of memory discs rigidly secured to said hub, a top cover releasably attached to said latch portion and extending outwardly therefrom and hence downwardly around said memory structure, and a bottom cover releasably attached to said threaded portion and extending therefrom into engagement with said top cover, the improved bottom cover which comprises: A generally circular panel adapted to cover the bottom of said memory structure with said panel having a central aperture therein; A knob member having a manipulating portion which is larger than said aperture and located below said panel and a stem portion integrally formed with said manipulating portion and extending upwardly herefrom through said aperture with said stem portion having a threaded surface near its upper end for releasable threaded engagement witH said threaded portion of said memory structure; A sleeve which is larger than said aperture located above said panel with said sleeve having an interior bore telescopically encircling said stem and an exterior upwardly facing surface; and Releasable attaching means releasably securing said stem to said sleeve.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |